Lid with a pressure release hole and a removable seal, for vacuum sealing of glasses and other glass containers used to pack foodstuff

• US 5,439,724 A
• Filed: 01/04/1994
• Issued: 08/08/1995
• Est. Priority Date: 09/10/1991
• Status: Expired due to Fees

• Current Assignee: Metalgrafica Rojek LTDA
• Original Assignee: Metalgrafica Rojek LTDA
• Inventors: Rojek, Arnaldo
• Primary Examiner(s): Ryan, Patrick J.
• Assistant Examiner(s): DIXON, MERRICK L
• Application Number:
  US08/177,029
• Time in Patent Office: 581 Days
• Field of Search: 428/64, 428/65, 428/66, 428/63, 264/154, 264/222, 264/261, 264/268, 264/270, 264/265, 264/DIG. 60, 425/296, 215/232, 215/349, 156/69
• US Class Current: 428/66.3
• CPC Class Codes: B29C 65/60 Riveting or staking
• CPC Class Codes: B29C 65/606 the rivets being integral with one of the parts to be joined, i.e. staking
• CPC Class Codes: B29C 66/5344 said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends B29C66/5346 takes precedence
• CPC Class Codes: B29C 66/542 joining hollow covers or hollow bottoms to open ends of container bodies
• CPC Class Codes: B29C 66/545 one hollow-preform being placed inside the other
• CPC Class Codes: B29C 66/55 sealing elements being incorporated into the joints, e.g. gaskets B29C66/52296 takes precedence
• CPC Class Codes: B65B 51/02 Applying adhesives or sealing liquids
• CPC Class Codes: B65D 51/1677 by rupturing a portion of the closure
• CPC Class Codes: Y10T 156/1052 with cutting, punching, tearing or severing
• CPC Class Codes: Y10T 428/214 End closure
• CPC Class Codes: Y10T 428/218 Aperture containing
• CPC Class Codes: Y10T 83/0457 By retaining or reinserting product in workpiece
• CPC Class Codes: Y10T 83/207 By suction means
• CPC Class Codes: Y10T 83/2079 Remaining or re-inserted product portion from base material
• CPC Class Codes: Y10T 83/209 Including means to replace product in base material after cutting

Abstract

A lid for sealing a container. The lid adheres to the container by a vacuum formed within the container. The lid is formed of a substantially circular panel having a flanged perimeter and a concave depression on an upper side of the circular panel. A pressure release hole extends through the concave depression of the circular panel and sanitary coating is disposed on a lower side of the circular panel. A first adhesive material is applied to the lower side of the lid by fusion to the sanitary coating to form a thin film over the release hole, and a second adhesive material is disposed in the concave depression on the upper side of the lid to form a removable seal. The second adhesive material has the same properties as the first adhesive material.

Claims

1. A lid for sealing a container, the lid adhering to the container by a vacuum formed within the container, the lid comprising:

a substantially circular panel having a flanged perimeter and a concave depression on an upper side of the circular panel;

a sanitary coating disposed on a lower side of the circular panel;

a pressure release hole extending through the concave depression of the circular panel;

a first adhesive material applied to a lower side of the circular panel by fusion to the sanitary coating to form a thin film over the release hole; and

a second adhesive material disposed in the concave depression on the upper side of the circular panel to form a removable seal, the second adhesive material having the same properties as the first adhesive material.

2. The lid of claim 1 wherein the first and second adhesive materials are a vulcanized resin applied in a liquid state that solidifies to the circular panel and the first and second adhesive materials melt together to form a unitary seal.

3. A releasable lid for a vacuum sealed container, the lid being released from the container upon discharge of the vacuum, the lid comprising:

a panel;

a vacuum discharge hole extending through the panel; and

a removable adhesive material disposed on the panel and sealing the vacuum discharge hole, whereby removal of the adhesive material from the panel discharges the vacuum and releases the lid from the container.

4. The lid of claim 3 wherein the lid further comprises a substantially circular panel having a flanged perimeter.

5. The lid of claim 3 further comprising a substantially circular panel having a concave depression on an upper side of the circular panel.

6. The lid of claim 3 wherein the removable adhesive material comprises a first adhesive material disposed on a lower side of the panel and a second adhesive material disposed on an upper side of the panel.

7. The lid of claim 6 wherein the first adhesive material and the second adhesive material form a bond through the vacuum discharge hole.

8. The lid of claim 7 wherein the first adhesive material and the second adhesive material are substantially the same.

9. The lid of claim 8 further comprising a sanitary coating disposed on the lower side of the panel.

10. The lid of claim 8 wherein the panel is a substantially circular panel having a flanged perimeter.

11. The lid of claim 10 wherein the panel further comprises a concave depression on the upper side of the panel wherein the vacuum discharge hole is disposed in the concave depression.

12. The lid of claim 8 wherein the first adhesive material and the second adhesive material comprise a vulcanized resin that is applied to the panel in a liquid state and later solidifies to the panel so that the first adhesive material and the second adhesive material bond together through the vacuum discharge hole to form a unitary seal.